Synthesis and characterization of carbon fiber/silica aerogel nanocomposites

Ślosarczyk, Agnieszka; Wojciech, Strauchmann; Piotr, Ziółkowski; Jakubowska, Paulina

doi:10.1016/j.jnoncrysol.2015.02.013

Cited by 43 publications

(28 citation statements)

References 5 publications

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“…Similarly, the intensity of the Si-O-Si peak at 750 cm −1 also begins to decrease significantly. The variations in peak intensity confirm that as the GO content increases from 0 to 2 wt% the number of free hydroxyl and hydrocarbon groups present on the surface of the composite gels decreases [63]. In contrast, the peak at 950 cm −1 , associated with the Si-OH vibrations, increases as the loading of GO increases to 2 wt%, presumably due to the abundance of oxygen functional groups located on the edges of the GO sheets [64].…”

Section: Resultsmentioning

confidence: 70%

“…Previous reports have highlighted the potential of carbon based materials, such as carbon fibres and nanotubes, etc. to, preventing shrinkage and pore collapse of silica aerogels [63,71,72]. However, in contrast to GO, quantities N0.5 wt% of the silica aerogel mass were often required to reduce shrinkage of the porous silica framework [71,72].…”

Section: Resultsmentioning

confidence: 99%

“…Additionally, material properties such as, density, pore diameter and surface area were impeded. The intercalation of the silica aerogels with high density carbon fibres increased the density of the composite gels and distorted pore diameter [63]. Alternatively, the addition of more lightweight carbon microfibers preserved the low density of silica aerogels but the surface areas of the materials were diminished [71].…”

Section: Resultsmentioning

confidence: 99%

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Graphene oxide reinforced high surface area silica aerogels

Dervin

Lang

Perova

et al. 2017

Journal of Non-Crystalline Solids

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Silica aerogel structures were intercalated with graphene oxide (GO) via the addition of GO to the colloidal silica sol and subsequent sol-gel polymerization. The potential of GO to act as a nanofiller, for ambient pressure dried, hydrophobic silica aerogels, was systematically investigated. The influences of 0 to 2 wt% GO loadings, on the physical properties of silica aerogels, were analysed by examining the bulk density, volume shrinkage (%), pore volume and surface area of the composite aerogels. Additionally, the chemical composition of the composite gels was determined using FTIR, Raman, XRD and XPS. The study revealed that a GO addition of as little as 0.5 wt% is capable of supporting the porous framework of silica aerogels and also enhancing the properties of the gels simultaneously. The additions of 0.5 wt% GO increased the surface area and pore volume of the aerogel from 390 to 700 m 2 /g and 0.59 to 0.99 cm 3 , respectively, and decreased aerogel density from 0.19 to 0.14 g/cm 3 . The investigation therefore revealed that intercalation of the silica aerogel matrix with small quantities of GO can inhibit volume shrinkage during drying without hindering the physical properties of silica aerogels.

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Section: Resultsmentioning

confidence: 70%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Graphene oxide reinforced high surface area silica aerogels

Dervin

Lang

Perova

et al. 2017

Journal of Non-Crystalline Solids

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“…This can be due to the end-effect of overlapping of bands originating from the stretching and oscillatory vibrations of C-H bonds. This may indirectly indicate the lack of total reaction between the silica structure and the surface area of carbon fibers that are blocked by the nickel nanolayer and from which the increase of the silica chain begins in the case of a composite with pure carbon fibers [26][27][28]. Raman spectra of silica aerogel AG, carbon fibers CF, and nanocomposites AG10%CF, AG15%CF, AG10%CFNi, AG15%CFNi, which correspond to the FTIR analysis are seen in Figure 5.…”

Section: Physical and Chemical Characterization Of Carbon Fiber-silicmentioning

confidence: 98%

“…The fibers were 700 µm long with a diameter of 13 µm (DONACARBO, Osaka, Japan). Carbon fibers were modified using nitric acid to increase the content of functional groups containing oxygen (e.g., hydroxyl, carboxyl) on their surface and to enhance the number of connections between the silica structure and carbon fibers according to procedure described earlier [26][27][28]. In case of nickel-coated carbon fibers, the oxidized surface resulted in improved electrodeposition of metal.…”

Section: Preparation Of Carbon Fiber-silica Aerogel Nanocompositementioning

confidence: 99%

Carbon Fiber and Nickel Coated Carbon Fiber–Silica Aerogel Nanocomposite as Low-Frequency Microwave Absorbing Materials

et al. 2020

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Silica aerogel-based materials exhibit a great potential for application in many industrial applications due to their unique porous structure. In the framework of this study, carbon fiber and nickel coated carbon fiber–silica aerogel nanocomposites were proposed as effective electromagnetic shielding material. Herein, the initial oxidation of the surface of carbon fibers allowed the deposition of a durable Ni metallic nanolayer. The fibers prepared in this way were then introduced into a silica aerogel structure, which resulted in obtaining two nanocomposites that differed in terms of fiber volume content (10% and 15%). In addition, analogous systems containing fibers without a metallic nanolayer were studied. The conducted research indicated that carbon fibers with a Ni nanolayer present in the silica aerogel structure negatively affected the structural properties of the composite, but were characterized by two-times higher electrical conductivity of the composite. This was because the nickel nanolayer effectively blocked the binding of the fiber surface to the silica skeleton, which resulted in an increase of the density of the composite and a reduction in the specific surface area. The thermal stability of the material also deteriorated. Nevertheless, a very high electromagnetic radiation absorption capacity between 40 and 56 dB in the frequency range from 8 to 18 GHz was obtained.

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Carbon Fibers‐based Silica Aerogel Nanocomposites

Ślosarczyk

2016

Intelligent Nanomaterials

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Synthesis and characterization of carbon fiber/silica aerogel nanocomposites

Cited by 43 publications

References 5 publications

Graphene oxide reinforced high surface area silica aerogels

Graphene oxide reinforced high surface area silica aerogels

Carbon Fiber and Nickel Coated Carbon Fiber–Silica Aerogel Nanocomposite as Low-Frequency Microwave Absorbing Materials

Carbon Fibers‐based Silica Aerogel Nanocomposites

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